JDBC driver bug?

Dear Developers,

First, sorry my bad English.
My platform:
- postgresql 8.0.3 and 8.0.0 with SuSE Linux.
- java 1.5 update 4 (problem with it), java 1.4.2 (working without problem)
- jdbc 3 driver 312 (latest stable)

I found the following problem:
If I connect to the database from local host with java 1.5, or with java
1.4.2 from other box everything is good (connection time <1 sec).
When I connect to the database on other box, there is slow connection
(5-6 sec).

If you have any other question, please mail it.

Regards,
   Ferenc